MKV is high compatible with different encoded video, audio and subtitle stream. So more and more videos will be encoded with MKV. In order to convert MKV videos to your portable players supported formats, like AVI, MP4, WMV, MOV, 3GP as well as MP3, AAC, M4A. So you need a wonderful tool to help you solve this problem. 4Easysoft MKV Converter is your best choice.
The following is the detailed guide:
Preparation: Download and install 4Easysoft MKV Converter
Step 1: Add files
Click "Add File" button to load the video files that you like.
Step 2: Set output settings
You can select various output formats simultaneously for source file from the profile drop-down list.
You can set Encoder, Bitrate, Channels, Resolution and so on by clicking “setting” button.
Step 3: Start conversion.
Click “Convert” to begin the conversion with high output quality and converting speed.

Editing Tips:
Tip 1: Effect
Click “Effect” button, you can set the video Brightness, Contrast, Saturation and check Deinterlacing to help you optimize the video effect.
Tip 2: Trim
Click “Trim” button, you can pick up any part of your videos by dragging the slider bar; inputting "Start Time" and "End Time".
Tip 3: Crop
Click “Crop” button, you can set the frame size by selectting a crop mode; adjusting the crop frame; or setting the crop values.
Tip 4: Watermark
You can add picture or text watermark with customized transparence, position and other features in your movie to personalize your videos.

Tip 5: Preference
Click "Preference" button, you can select the output destination, the Snapshot folder, and the image formate, etc.
Tip 6: Snapshot
Just click the "Snapshot" button while previewing the video, and the images will be saved automatically. Then click the "Open Folder" next to "Snapshot" button, you can find the images.
Tip 7: Merge & Rename
If you want to merge several files into one file, you can choose them and click the "Merge" button to do it. Furthermore, you can name the output videos as you like by clicking "Rename" button.

